DESCRIPTION
WIRING DIAGRAM
PROCEDURE
1. |
CHECK MICROPHONE (OPERATION CHECK) |
(a) Enter the "Microphone Check" screen. Refer to Check Microphone in Operation Check (See page
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(b) When a voice is input into the microphone, check that the microphone input level meter changes according to the input voice.
OK:
Check result is normal.
OK | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
2. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY)) |
(a) Disconnect the E40 navigation receiver assembly connector.
(b) Disconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E40-4 (MACC) - P12-9 (ACC) |
Always |
Below 1 Ω |
E40-5 (MIN+) - P12-11 (MIC+) |
Always |
Below 1 Ω |
E40-19 (MIN-) - P12-12 (MIC-) |
Always |
Below 1 Ω |
E40-6 (SNS2) - P12-10 (SGND) |
Always |
Below 1 Ω |
E40-4 (MACC) - Body ground |
Always |
10 kΩ or higher |
E40-5 (MIN+) - Body ground |
Always |
10 kΩ or higher |
E40-19 (MIN-) - Body ground |
Always |
10 kΩ or higher |
E40-18 (SGND) - Body ground |
Always |
10 kΩ or higher |
E40-6 (SNS2) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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3. |
INSPECT NAVIGATION RECEIVER ASSEMBLY |
(a) Reconnect the E40 navigation receiver assembly connector.
(b) Reconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
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|
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
E40-18 (SGND) - Body ground |
Always |
Below 1 Ω |
E40-19 (MIN-) - Body ground |
Always |
Below 1 Ω |
*a |
Component with harness connected (Navigation Receiver Assembly) |
NG | ![]() |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
|
4. |
INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
(a) Remove the inner rear view mirror assembly (amplifier microphone assembly)
(See page ).
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
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5. |
INSPECT INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
(a) Reconnect the E40 navigation receiver assembly connector.
(b) Reconnect the P12 inner rear view mirror assembly (amplifier microphone assembly) connector.
(c) Turn the ignition switch to ACC.
(d) Connect an oscilloscope to terminals 11 (MIC+) and 12 (MIC-) of the P12 inner rear view mirror assembly (amplifier microphone assembly) connector. |
|
(e) Check the waveform of the amplifier microphone assembly using the oscilloscope.
Result |
Proceed to |
---|---|
A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is output |
A |
A waveform synchronized with the voice input to the inner rear view mirror assembly (amplifier microphone assembly) is not output |
B |
*a |
Component with harness connected (Inner Rear View Mirror Assembly (Amplifier Microphone Assembly)) |
A | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
B | ![]() |
REPLACE INNER REAR VIEW MIRROR ASSEMBLY (AMPLIFIER MICROPHONE ASSEMBLY) |
Ambient Temperature Sensor Circuit (B1412/12)
DESCRIPTION
The ambient temperature sensor is installed in front of the condenser. It detects
the ambient temperature to control air conditioning AUTO mode. This sensor is connected
to the A/C amplifier and detects fluctuations in the ambient temperature. ...
Front Occupant Classification Sensor LH Collision Detection (B1785)
DESCRIPTION
DTC B1785 is output when the occupant classification ECU receives a collision
detection signal sent by the front occupant classification sensor LH if an accident
occurs.
DTC B1785 is also output when the front seat assembly RH is subjected to ...
Back-up Power Source Circuit
DESCRIPTION
The back-up power source circuit for the A/C amplifier is shown below. Power
is supplied even when the ignition switch is turned off. The power is used for diagnostic
trouble code memory, etc.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE ...